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URL: https://oeis.org/A221750

⇱ A221750 - OEIS

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A221750
Number of n X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.
0
0, 2, 0, 241, 4848, 6168942, 4330440582, 38847950279710
OFFSET
1,2
COMMENTS
Diagonal of A221755
EXAMPLE
Some solutions for n=4
..1..1..0..1....1..1..1..1....1..1..1..1....0..2..1..0....0..2..1..1
..1..2..2..0....0..2..1..1....0..2..0..2....1..2..1..1....1..1..2..1
..0..2..1..1....1..0..1..1....1..1..1..1....1..1..1..1....1..0..0..2
..1..1..2..0....1..2..2..0....2..0..2..0....1..1..2..0....1..1..2..0
CROSSREFS
Sequence in context: A111814 A036938 A344463 * A284451 A348183 A012330
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 24 2013
STATUS
approved